Hi

Is it possible to draw more than one surface on a grid surface chart?

We are generating a surface by fitting the best surface to a series of (x, y, z) points, and we want to overlay the original (x, y, z) data to see how good the fit is. The original data is ideally drawn as series of points, with a drop down line onto the base "plane" so we can get an idea where the points lie in relation to the fitted surface.

We would also want to highlight one point on the surface as a the selected surface location.

Hope this makes sense.

Thanks

Kevin

That's what I thought. Here's a sample of my code with the added points and lines:

for (int zIndex = 0; zIndex < zLength; zIndex++)
{
for (int xIndex = 0; xIndex < xLength; xIndex++)
{
gridSurface.Data.SetValue(xIndex, zIndex, yData[yIndex]);

series.AddDataPoint(new NDataPoint(xIndex, yData[yIndex], zIndex));

dropLines.AddDataPoint(new NDataPoint(xIndex, 0, zIndex));
dropLines.AddDataPoint(new NDataPoint(xIndex, yData[yIndex], zIndex));
dropLines.AddDataPoint(new NDataPoint(xIndex, double.NaN, zIndex));

yIndex++;
}
}

I wanted to attach an image but can't see how to. Basically the series and droplines ignore the z values. My grid has a maximum z of 5. Series is displayed at fixed z = 6 and droplines at z = 8.

I've tried adding the point surface, but that is also offset from the original surface.
The same thing happens if I switch to using a mesh surface.

I'm not quite on the latest version if this was fixed recently.

Any ideas?

Thanks

Kevin

Hi Kevin,
Make sure that series and dropLines have UseXValues and UseZValues set to true. Is this the problem?

Best Regards,
Nevron Support Team

That would be it! Now we're getting somewhere. Now I need to work out how to make the surface partially transparent, so the points are readily visible.

Thanks for all the help and quick responses. Much appreciated.

Kevin